Thomas r



(No Model.)

Patented Aug. 13,1889.

1 h 1.1. 4 & :1

WA/DEW UNITED STATES PATENT OFFICE.

THOMAS R. LEIGHTON, OF ERIE, PENNSYLVANIA, ASSIGNOR TO THE JARECKIMANUFAOTURIN G COMPANY, (LIMITED,) OF SAME PLACE.

NIPPLE-HOLDING CHUCK.

SPECIFICATION forming part of Letters Patent No. 409,108, dated August13, 1889.

Application filed May 31, 1889, Serial No. 312,678. (No model.)

T 01, whom it may concern:

Be it known that I, THOMAS R. LEIGHTON, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented certain new and useful Improvements in Nipple-Holding-Chucksand I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theIO art to whiehit appertains to make and use the same.

This invention relates to nipple-holding chucks; and it consists incertain improvements in the construction thereof, as will be [5hereinafter fully set forth, and pointed out in the claim.

The invention is illustrated in the accompanying drawing by a singlefigure, which is a longitudinal sectional view, the changed 23 positionof the parts being shown by dotted lines.

The chuck consists of a body A, having a longitudinal chamber A, and astem or shank A within the longitudinal chamberA. There 25 are twopivoted jaws B B, which act like brought together, and when the sleeveis in theposition shown by dotted lines the jaws are thrown apart. Ifdesired, friction-rollers h are put in the jaws B atthe point where thesleeve acts upon it, and a steel facingring (Z may be put on the sleeve,if desired.

The sleeve D may be moved by hand, or itmay be acted upon by ashifting-lever, if desired. In the drawing, a groove (2 is shown, inwhich the shifter may be adjusted when 5 used. The action of the partscan be easily understood from the drawing, and requires no furtherexplanation. The action of the chuck in grasping and releasing a nippleis very prompt, and the arrangement of parts is such that a nipple iscertain to be held when grasped in an exactly concentric position.

that I claim as new is- In a nipple-holding chuck, the combination, withthe body A, having a longitudinal chamber A therein, of pivotednipper-levers B 13, arranged within said chamber and having their endsprotruding therefrom at both ends, and a sliding sleeve D, whichembraces said tongsornippers. The pivot C, on which these body A andacts upon the said protruding jaws are pivoted, is a bolt which passesends of the nipper-levers as it is moved one through the body A. Thegrippingfaces of way or the other and thereby opens or closes the jawsare screw-threaded, as at b I), so as the said nippers. 0 to grip ascrew-threaded nipple. On the body In testimony whereof I affix mysignature in 6 5 A, which is cylindrical in form, is a sliding presenceof two witnesses. sleeve D, which isof less length than the le- THOMASR. LEIGHTON. vers B, which form -the tongs or nippers above \Vitnesses:referred to. hen this sleex e D is in the JNO. K. HALLOCK, 35 positionshown in full lines, the jaws are \VM. P. HAYES.

